Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
Which of the following represents the kind of bonding present in ammonium chloride?
ionic only
covalent only
ionic and covalent
dative covalent
Correct answer is C
No explanation has been provided for this answer.
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
electrovalent bond
compound bond
ionic bond
covalent bond
Correct answer is D
When ammonia and hydrogen ion go into bonding, they form ammonium ion with a one dative covalent bond and three covalent bonds.
75cm\(^3\)
125cm\(^3\)
100cm\(^3\)
50cm\(^3\)
Correct answer is B
No explanation has been provided for this answer.
150°C
177°C
75°C
120°C
Correct answer is A
Parameters given:
V\(_1\) = 200 cm\(^3\); T\(_1\) = 27 + 273 = 300K.
V\(_2\) = 150 cm\(^3\); T\(_2\) = ?
P\(_2\) = 2P\(_1\).
Using the Ideal Gas Equation:
\(\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\)
\(\frac{P_1 \times 200}{300} = \frac{2P_1 \times 150}{T_2}\)
\(\frac{2}{3} = \frac{300}{T_2}\)
T\(_2\) = 450K.
= 450K - 273K
= 177°C
177 - 27 = 150
That is the amount by which T1 must be increased.
XY
X\(_2\)Y
Y\(_2\)X\(_3\)
X\(_2\)Y\(_3\)
Correct answer is C
No explanation has been provided for this answer.